Lock



A.YSPRUNG. LOCK.

APPLICATION FILED DEC. I3. 1919. l ,404,556, Patented Jan. 24, 1922.

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LOCK.

APPLICATION FILED DEC. I3. 1919.

Patented Jan. 24, 1922.

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- view, similar to Fig.

1n an unlocked position.

OFFICE.

` ABRAHAM SPRU'NG, 0F NEW YORK, N. Y.

Loox.

Specification of Letters Patent.

Patented Jan. 24, 1922.

Application led December 13, 1919. Serial No. 344,667.

To all whom t may concern Be it known that I, ABRAHAM SPRUNG, a

'citizen of the United States, and a resident of the city 4of New York, county of New York, and State of New York, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention relates to locks adapted to successfully resist tampering, attempts at picking or jimmying.

One of the objects of this invention is to provide a practical device of the above type characterized by simplicity of construction and efficiency of action in a high degree.

Another object is to provide in a lock of the above type extremely simply constructed and eiicient means for releasing the slide member carrying the lock bolts and sliding the same so as to bring the bolts into or out of engagement with the keeper. Other objects will in part be obvious and in part pointed out hereafter.

The invention accordingly vconsists in the featuresof construction, combination of ele'- ments and arrangement of parts which will be exemplified in the apparatus hereinafter described and of which the scope of application will be indicated in the following claims.

In the accompanying drawings in which is shown one of various possible illustrative embodiments of this invention,

Figure 1 is a partial plan and sectional view of a lock made in accordance with the invention, the section being taken on line 1 1 of Fig. 2.

Figure 2. is a longitudinal sectional view showingits application.

Figure 3 is a transverse sectional view takenon line 3 3 of Fig. 1.

Figure 4 is a perspective view showing the keeper in detail.

Flgure 5 is a partial plan and sectional v, but showing the parts Figure 6 is a perspective view of the lock locking from the outer side, part of the casing being broken to show its construction.

Figure 7 is a perspective view of one of the double cam tumblers in detail..v

Figure 8 is a similar view of the other cam tumbler.

Figure 9 is a perspective view of the hook bolt block in detail. v, f

Referring to the drawings in detail, the numeral 10 designates the metal body or casing of theloc'k, the same being. preferably a hollow rectangle provided with countersunkropenings 11 in its outer wall for the reception of bolts or screws 12 to secure the lock to. a door or the like.`

Extending from the front end of the casing are three integral projections, respectively 14, 16 and18, containing chambers 15, 17 and 19, the chambers 17 and 19 communieating with the interior of the casing through the wall 20. i

A guide bar 22 is formed with or secured to the inner wall of the casing so as to extend from side to side therein.

Movable between the guide bar 22 and wall 20, is the bolt slide, the same being an elongated block 24 having recessed'ends 25 to clear the screws 12, and a longitudinal recess 26 engaging the guide bar 22, holding it against the wall and also in engagement with a ledge 28 entering a similar recess 29 in the opposite side of the block.

Formed integrally with the slide block 24 are two arms 30 and 32,'the former being positioned so'as to extend into the chamber 17, while the arm 32 is attached at the end of the block and extends into the chamber 19.

These arms terminate in right angled projections which constitute hook like bolts 31 and 33, operative respectively in the chambers 15 and 17, the rear surfaces oftheV bolts, when in an unlocked position, being flush or level with the upper surfaces of theJ projections 16 and 18, while the ends of the bolts are level with the lower surfaces of the same. WhenA the bolts are in a locked position the arms and bolts extend from one chamber into the other, the end of the bolt 31 entering the chamber 15, the bolt 33 at the same time passing partially into the chamber 17.

vA keeper comprising a front plate 35 and angular flange 36 is secured to the jamb of' the door by suitable fastening means passing through the openings 37, the front plate having a pair of raised lugs 38 rand 40 containing through passages 39 and 41 adapted to receive the bolts 33.

The slide block 24 has an opening 44 centrally located in the side opposite the arms, and slidable in this opening is a plunger 45,

normally forced outward by a coiled compression spring 46, in the rear portion of the hole, the plunger terminating in an en-` larged rectangular head 47.

An abutment or stop bar 48 is fixed internally to the front plate of the look casing,

parallel. to lthe guide 22, and formed with it is al central front lug 50 against which the plunger head 47 makes contact so as .to hold the slide block 24 in either of its operative..

positions, the bar 48 preventing the plunger from moving outward beyond a predetermined distance. .f

The plunger 45 may have an elongated slot 52, the same receiving a pin 53 set in the block 24, the 1 pin preventing vthe plunger from turning iand also limiting its lengthwise movement in an obvious manner.

A-knob 55 extends outward from the casing plate, the length .of its hollow stem 58, the same being xed on a shouldered sleeve 57, its base 58 being rotatable within the.

casing, and secured rigidly on the inner end .j of the sleeve base 58 is a cam plate 60 having a pair of flat cam-like wings 61 and 63 arranged preferably at approximately ninetyV nated by the numeral 70 are also carried at the inner vend of the key actuated plug 72, rotatable in the barrel 73 of any preferred type of cylinder lock operated by keys 74 of well known character; thus lthe cam pairs register in the same axial plane but operate independently, and both pairs'of cams are so located as to make contact with the plunger head 47 as will be evident. v

A. pair of bent flat springs 75 and 76 are arranged with theirl coiled portions encircling a sleeve 77, through which the rear- Amost screw 12 passes, the arms ofthe sprin making contact with the rear surfaces of t e cams, holding them normally in neutral position. Y

In operation let it be assumed that the device isin an unlocked position and that it is desired to lock the doorfromits inner side,

'Y the knob 55. will be turned.l counter-clock wlse, causing the cam to contact with the v end of the .plunger 45, forcing it inwards agalnst the spring 46, away from the-bar 48,

, until the retracted end 45 of the plunger will pass over the rigid lug 50, at 'which time the projectlon 67 of the cam 60 will contact with the slde of the plunger, moving it over the end of the projection and carrying with it the s'llde 24 and its integral bolts 31 and 33, causin them to engage the keeper elements 38 an 40. f Thereupon the knob will be turned slightly 1n a reverse direction,'by the spring 76 into a neutral position, thus permitting the lunger to bemoved out by the s'pring, an seat -against the bar on the opposite side of the lug 50.

It Will-be noted that the cam plate 60 thus serves both to release the slide member and to move the latter so as to bring the lock bolts 31 and 33 into or out of engagement with the keeper. The necessary operation of first releasing the bolt and then translating the same to move the bolts into or out of engagement with the keeper is thus effectively accomplished yby lone .simply constructed member which obviates complexity and multiplicity of parts `and makes for sure and eflicient operation by very simple manipulation and at a minimum of cost of manufacture.

i Obviously unlocking can be accomplished by a reverse action of the knob, and it will be evident that the cams actuated by the cylinder lock can be operated by a key fitting the same from the other side of the door. f

When in a locked position it is not possible to forcethe bolts into an'unlocked position except by breaking-or sheeringfeither the plungeror lug against which it contacts, and as ll parts of the lock are neatly tted there a e no opening or crevices into which a lever or jimmy can be inserted for this purpose, thereby a safety lock of unusual security has been described.

It will thus be seenjthat there is provided a lock in which the several'objects of this invention are achieved and which is well adapted for practical use.

As various possible embodiments might be made of the above invention and as various changes might be made in the embodiment above set forth, it is to be undestood that all matter herein set forth or shown in the acments carriedv by said block catch means for holding said block in given position and means adapted to act on said catch means progressively to release said block and slide the latter in said casing.

2. 4In lock construction, in combination, a casing, a block slidable Itherein, bolt elements carried by said block andcatch means catch means adapted to be operated to release said block and slide the same.

- 3. In lock construction, in combination, a casing, a block slidable therein, bolt elements carried by said block and catch means for holding the block in given position, Aand an, actuating member for operating said catch means to release said block and slide the same by a continuous operation of said actuating element on said catch means.

4. In a lock, the combination with a casing, a block slidable transversely therein,

for holding the block in given position, said hook boltsv carriedby said block, a spring actuated plunger extending from 'said block opposite said bolts and a cam adapted progressively to depress said plunger and engage therewith to slide said blockl 5. In a lock, the combination with a casing, a -block slidable transversely therein, hook bolts formed with said block and fixed guides for said block, of a spring actuated' plunger extending from said'block opposite said bolts an abutment fixed in the path 'of said plunger, a cam adapted to depress said plunger and means formed with said cam adapted to4 move said plunger past said abutment. Y

6. In a lock, the combination with a casing, a block slidable therein, and bolt elements carried by said block,l of a plun er movable in the block, a spring norma ly extending said plunger, an abutment in said casing in the path of said plunger whereby said block is held in either of two positions,

a two winged cam rotatable in said casing said cam being adapted to retract said plunger, means formed with said cam contactable with the sides of said plunger wherebyV it may be moved past-said abutment when retracted, and 'means for 'rotating said cam.

7. Ina lock, the combination witha casing, a block slidable therein, and bolt elements carried by said block, of a plunger movable in the block, a rectangular head formed with said plunger, a pair of double winged cams operable onthe same axis independently of each other, means for actuating said camsvfrom the side of the lock adjacent thereto, an abutment, stops for,

said plunger formed with said abutment'and means carried by saidcams for moving said plunger past said abutment.

8, In aflock, vthe combination with a casing, a block slidable therein, and bolt elements carried by said block, of a plunger movable in the block, a spring normally extending saidplunger, an abutment in said casing in the path of saidvplunger whereby said block is held in either of two positions,

vmoved -in either direction, and fingers formed at the extremities of each of said cam wings engageable with the sides of said plunger'v whereby said block may be moved from side to side in said casing.

`9. In a lock, the combination with a cas- 3 ing, a block slidable therein, and bolt elements carried by said block, ofy a sprin actuated plunger set centrally in said b ook, means for positively locking said block when in contact with either side of said casing, a pairvof cams each independently operated from opposite sides of the lock, said cams when rotated in either direction depressing said plunger andA moving said block, and means for returning each of same cams to a. neutral position.

'10. A lock comprising a casing, a vslide movable from side to side therein, hook bolts formed with said slide, guides extending from said casing into which said bolts are retractable, a vspring extended plunger in said slide, a fixed stop for said plunger, a

lug extending from said stop into the path of movement of said plunger, a p air of spaced cams rotatably mounted in said cas-y ing adapted to retract' said plunger, lugs formed with said cams ladapted to contact with the plunger and move said slide, means for manually actuating said cams, and resilient means for normally maintaining said cams in neutral positions.

11. In a lock having a bolt carryin slide v I and a spring 'impelled plunger in sai slide by which it isactuated, of one or more cams engageable with said plunger, said cams comprised of double lobed portions of constantly increasing radio divergent from the axis on which the cams rotate, said cams including means at their extremities to move said plunger laterally, and meansfor man ually actuating said cams.

In testimony whereof I have -signedmy vname to this specication.

ABRAHAM" SPRUNG. 

